I now agree that they should play mid sized venues also. Like I said, they sold out United Center in a few weeks, I think they could have filled a stadium. More fans or to be fans buying cheap seats coming to the show, listening from outside on the beach etc couldn't hurt I don't think. But then again Ide rather see them inside because of the special effects.
You guys mentioned "Sound" What exactly do you mean? Are stadiums not as loud, poor sound or what?